Process of mechanical reliefing previous to typographic printing.



intro spans ARNALDO MAE-Z10, 01* MllLAIiT, ITALY.

Laaarea,

No Dra /mg Application filed March 20, 1916. To all wheat it may concern.

Be it known that I, ARNALDO MARZIO, a subject of the King of Italy, residing at Milan, {ingdom of Italy, have invented certain new and useful Improvements in Processes of Mechanical. Reliefing Previous to Typographic Printing, of which the following is a specification.

To prepare for printing ofi', it is usual to place on the surface of the cylinder which is to receive the sheet of paper to be printed througg h pressure against an inked form, a number of reliefs which force the paper to project in such places where a very black print is desired. Such reliefs have to raise the paper more or less according to the greater or smaller effect which is desired at a given point. It is usual to proceed in this matter by pasting bits of paper on a sheet previously printed lirom the form so as to obtain graduated reliefs in difierent points according to the effects desired. Such an operation requires a long time and a special ability and is therefore expensive.

Many ways have been devised to dispense with the work ordinarily involved by using special substances to form reliefs at given points-but no successful system has been introduced, as such substances demanddampness or heat to become adherent to the sheet, the consequence being an alteration in the dimensions of-the sheet which destroys the correspondence between sheet and form and leads to indifierent results. The procwhich is to be described here is based upon the use of a resinous granular matter, in grains of convenient size, free of dust.

Just after obtaining. a print from the form on the sheet, which ought to be thin, absolutely non absorbent and preferably transparent, this print is covered with the resinous grains. The viscous ink fixes an amount of the grains proportional everywhere to the density of Pure proportional to the desired relief.

After taking off the surplus grains witha hrushv or any other convenient tool, a brush is used to cover the sheet with. powdared pumice stone or other fine and inert powder of any kind to protect the grains, after which the sheet Specification of Letters Patent.

from the inked formv the ink, and there signature this 22nd give consistence to Patented July it suits Serial No. 85,489. (Specimens) is passed through a calender, ing machine itself is used for that purpose, the object being to promote the perfect amalgamation of the pumice stone with the resinous powder.

If necessary both faces of the sheet may be treated in the manner above described or severai sheets may be treated so as to ob tain such reliefs as found desirable.

Claims: 1. A process of typographic reliefing,

which consists in obtaining an impression upon a foundation sheet; dusting the printed surface of the sheet with a resinous powder, so as to cause the inlgto fix said powder throughout the impression proportionally tothe density of the ink thereon; der to the surface so treated, to give consistence to the resinous powder and to protect the same.

2. A process of typographic reliefing, which consists in obtaining an impression from the inked form on a thin, non-absorbent, transparent sheet; dustingthe printed surface of the sheet with a resinous powder, so as to cause the ink to fix said powder throughout the impression proportionally to the density of the ink thereon; and applying an inert powder to the surface so treated, to give consistence to the resinous powder and to protect the same.

A process of typographic reliefing, which consists in obtaining an impresssion from the inked form upon a foundation sheet; dusting the printed surface of the sheet with. a resinous powder, so as to cause the ink to fix said powder throughout the impression proportionally to the density of the ink thereon; applying powdered pumice stone to the surface so treated, to give consistence to the resinous powder and to protect the same; and finally amalgamah ing the inert powder with the resinous powder by pressure.

In testimony whereof I hereby atiix ny day of February, 1916. ARNALDO MARZIU. Witnesses L. R. Anson, ARTHUR P. Corona.

or the printv and applying an inert pow- 

